Display device, electronic appliance including the same, and external power supply device

An electronic appliance includes a display device and a power supply device providing a driving voltage to the display device. The display device avoids high inrush current to provide high quality display. The display device is connected to a power supply device providing a driving power to the display device. The display device comprises a display panel having a plurality of data lines and gate lines crossing each other, a plurality of pixels arranged in matrix form defined by the data and gate lines, a data driver, a gate driver, a timing controller adapted to control the data and gate drivers. The timing controller is adapted to control the driving of each gate line of the gate driver to correspond to a zero-cross point of the driving power supplied from the power supply device for driving the display panel.